The driver of one of the vehicles in the head-on crash experienced a medical episode, causing him to drive northbound in the southbound lanes of Interstate 83, according to Pennsylvania State Police Trooper Rob Hicks.

A Ford Taurus, driven by Neal Strein, 67, of New Freedom, was the vehicle driving the wrong way, Hicks said. It struck a southbound Buick LeSabre, driven by Richard Doster, 54, of Old Freeland, Md.

Doster was entrapped in his vehicle and had to be extricated, Hicks said.

Both men were taken to York Hospital. As of Wednesday afternoon, Strein was in satisfactory condition, while Doster was in serious condition.

Update 10 p.m. : Interstate 83 has reopened after the crash, according to York County 911.

Earlier report

Emergency responders are on the scene of a crash in Shrewsbury Township where a vehicle is blocking both southbound lanes of Interstate 83.